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kotttt
@kotttt
August 2022
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Найти область значений функции:
y=cos^2x+cosx+2
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jimniykek
Cos^2(x) + cos(x) + 2 = 1/2(1 + cos(x)) + cos(x) + 2 = 1/2 + 1/2 * cos(x) + cos(x) + 2 = 3/2 * cos(x) + 3/2 = 3/2( cosx +1)
Область определения - все рациональные числа
Множество значений:
7/4≤y≤4
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Answers & Comments
Область определения - все рациональные числа
Множество значений:
7/4≤y≤4